Support Formatter defaults parameter in logging.config.dictconfig and fileconfig

[bharel]

Feature or enhancement

Currently the logging.Formatter defaults parameter is unsupported in logging.config methodologies. Simply support it.

Pitch

There's no reason for inconsistency between the rest of the variables which are supported, and this that isn't.
The implementation is fast and simple, and was requested on the original issue.

Previous discussion

#20668 (comment)
#85061 (comment)

I will create a PR right after this issue with the addition.

Linked PRs

• gh-103357: Add logging.Formater defaults support to logging.config fileConfig and dictConfig #103359